What better way to indicate a busy printer than the spinning beach ball.
Since the blades are modular and snaps together, you can mix and match colors to create your own custom spinner. You don't even have to use all six blades, use two or three for a different look.
If you are using the 6 blades base and not the tri or dual blade base you can still evenly space the blades by doing the following:
You can also get creative with infill patterns by setting top and bottom layer height to zero.
So slap one on your extruder motor and watch it go while you wait.
Glue 8×3mm magnet to the back of the base and attach spinner to extruder motor.
Since it's a small part with tight fitting tolerance, print slowly for best results.
You can also glue the pieces together.
GCODE for all files included if you don't want to slice it yourself.